package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;
//import sun.security.util.Password;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传输的明文密码进行Md5加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
/**
 * 这段代码的功能是创建一个新的Employee对象，用于存储从EmployeeDTO对象中拷贝过来的员工信息，
 * 并补充一些默认值和系统生成的值，最终通过EmployeeMapper将其插入数据库
 * 前端传输的数据通过EmployeeDTO对象封装，但是与mapper交互数据的时候需要通过employe对象进行交互
 * 所以需要使用BeanUtils.copyProperties()方法进行属性拷贝，把EmployeeDTO中的数据拷贝到employee对象中，然后再把确实的数据进行补充
 */
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //创建时间
        employee.setCreateTime(LocalDateTime.now());

        //更新时间
        employee.setUpdateTime(LocalDateTime.now());

        //设置账号状态，默认正常状态1表示正常0表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //创建人
        employee.setCreateUser(BaseContext.getCurrentId());

        //设置密码，默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置当前记录创建人id以及修改人id
//        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());

        //调用持久层mapper
        employeeMapper.insert(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page= employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee>records = page.getResult();
        return new PageResult(total,records);
    }

    /**
     * 启用禁用员工参数
     * @param status
     * @param id
     */
    @Override
    public void startORStop(Integer status, Long id) {
        Employee employee= new Employee();
        employee.setStatus(status);
        employee.setId(id);
        //链式调用
//        Employee employee = Employee.builder()
//                .status(status)
//                .id(id)
//                .build();
        employeeMapper.update(employee);
    }

    /**
     * 根据员工ID查询员工数据
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     *编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        //更新时间
//        employee.setUpdateTime(LocalDateTime.now());
        //设置当前记录创建人id以及修改人id
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(employee);
    }

}
